My persian cat has ringworm also and I have tried all sorts of things but it kept coming back. I have gone through about 10 bottles of conofite but it takes so long to heal. Same with the other things from over the counter like lotrimin AF etc. Finally, I got brave and ordered Fungrx from the internet. I had the ringworm around my ear. This stuff promised to have it healed in a week whereas the other stuff was 4 weeks. The fungrx worked great and one week later, my ringworm is almost completely healed. I will keep using it for a couple more days yet just to be sure. You can't use fungrx on cats so I ordered their recommendation of sulfinex cream. I've been using it 2 days and the improvement is huge. The redness is gone on the ringworm and it looks well on its way to healing. If you just do a search for fungrx, you will find it on the web. Same with sulfinex. This stuff worked great for me as I have been dealing with this ringworm for over a month on my Persian. Tried the internal stuff but had to stop as it made my cat sick. Conofite works but just takes way too long to heal it up. 3 or 4 weeks to get mine to heal. Been much happier with fungrx and sulfinex cream.